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An 8-32 mounting hole allows the CP33T Cage Plate to be mounted to a Ø1/2" post.

• Directly Mounts Optical Components Within a 30 mm Cage System Assembly
• 2 Thicknesses Available: 0.35" (8.9 mm) and 0.50" (12.7 mm)
• Tapped with Our Standard SM1 Thread (1.035"-40)
• Post Mountable via 8-32 (M4) Tapped Hole

The CP33(/M) cage plate is 0.35" (8.9 mm) thick and provides a center-located SM1 (1.035"-40) threaded bore that is compatible with our popular Ø1" lens tubes. The SM1-threaded bore can also directly accept a Ø1" optic up to 0.2" (5 mm) thick. Each cage rod through hole is accompanied by a side-located locking setscrew, which can be secured using a 5/64" (2.0 mm) hex key or balldriver.

The CP33T(/M) cage plate is 0.50" (12.7 mm) thick and has a center-located SM1-threaded hole that directly accepts optics up to 0.35" (8.9 mm) thick. It features an extra-thick design with double locking setscrews that enables two extension rods to be inserted end-to-end and firmly locked into place, providing a rigid connection between two cage system subassemblies. The cage rod locking setscrews can be tightened using a 5/64" (2.0 mm) hex key or balldriver.

Each cage plate includes two SM1RR retaining rings and has an 8-32 (M4) tapped hole for post mounting.

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The CP02F(/M) Cage Plate offers a 1/4"-20 (M6) tap for mounting on our Ø1" Posts.

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Cage rod arms can flex to compensate for cage rod misalignment due to tolerance stacking.

• Self-Aligning Cage Rod Arms Eliminate Cage Plate Binding
• Tapped with Our Standard SM1 Thread (1.035"-40)
• Directly Mounts Optical Components Within a 30 mm Cage System Assembly
• Post Mountable via 8-32 (M4) and 1/4"-20 (M6) Tapped Holes

The CP02F(/M) Flexure Cage Plate features a flexure arm design for locking onto 30 mm cage rods. This design compensates for the tolerance stacking effects common in cage systems, ensuring that the cage plate never binds or sticks within a constructed cage segment. The cage plate's orthogonal flexure arms remain rigid when handled, but will flex slightly to provide compensation for rod misalignment when installed within a constructed cage segment. This unique feature is illustrated in the diagram to the right. In contrast with the standard setscrew retention method of the CP33 Cage Plate, each CP02F arm clamps onto cage rods using a separate flexure clamp that increases holding force and cage plate rigidity.

Like our CP33(/M) cage plate, it is 0.35" (8.9 mm) thick and provides a center-located SM1 (1.035"-40) threaded bore that is compatible with our popular Ø1" lens tubes. The center-threaded bore of the CP02F(/M) can also directly accept a Ø1" optic up to 0.19" (4.8 mm) thick. Two SM1RR retaining rings are included. The cap screw on each flexure cage rod through hole can be tightened using a 5/64" (2.0 mm) hex key or Thorlabs' HKTS-5/64 Hex Key Thumbscrews.

For additional convenience, 8-32 (M4) and 1/4"-20 (M6) tapped holes are provided on opposite sides of the cage plate for post mounting applications. For Ø1" optics thicker than 0.125" (3.2 mm), we offer the CP06F(/M) Cage Plate with a Ø1" Double Bore.

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• Directly Mounts Bulk Optics Within a 30 mm Cage System Assembly
• Tapped with Our Standard SM1 Thread (1.035"-40)
• Post Mountable Via 8-32 (M4) Tapped Hole
• Thickness: 0.35" (8.9 mm)

The CP08(/M) Cage Plate provides a more stable clamping mechanism for cage rods than our popular CP33(/M) Cage Plate. It also offers a center-located SM1 (1.035"-40) threaded bore and 8-32 (M4) mounting hole. This cage plate uses a flexure clamping mechanism that increases the surface area in contact with the ER rods. The CP08(/M) uses four side-located 3/32" (2.5 mm) hex cap screws with for securing the cage rods. The central bore of the CP08(/M) can also directly accept a Ø1" optic up to 0.2" (5 mm) thick using two SM1RR retaining rings. One SM1RR retaining ring is included.

Thorlabs also offers the CP02F(/M) Flexure Cage Plate (sold above) with self-aligning cage rod arms that eliminate cage plate binding.

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The CP4S cage plate mounting an SM1FC FC/PC Fiber Adapter Plate within a cage system.

• Directly Mount Optical Components Within a 30 mm Cage System Assembly
• 3 Thicknesses Available: 4.0 mm (0.16"), 6.0 mm (0.24"), and 8.0 mm (0.31")
• Tapped with Our Standard SM1 Thread (1.035"-40)
• Not Post Mountable

At 4.0 mm (0.16"), 6.0 mm (0.24"), and 8.0 mm (0.31") thick, respectively, the CP4S, CP6T, and CP8T are the thinnest cage plates we offer. They have a center-located SM1 (1.035"-40) threaded bore that is compatible with our SM1 threaded optomechanical components. These plates allow the close spacing of optical components within a cage system. Each cage rod through hole is accompanied by a side-located locking setscrew, which can be secured using a 0.05" (1.3 mm) hex key for the CP4S cage plate or a 5/64" (2.0 mm) hex key for the CP6T and CP8T cage plates. Unlike the standard cage plates sold above, these cage plates do not offer an 8-32 (M4) tapped hole for post mounting.

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Rotating 30 mm Cage System

• Rotates an Entire 30 mm Cage System Subassembly Around a Fixed SM1-Threaded Bore
• Post Mountable via 8-32 (M4) Tapped Hole
• Rotation Locked with Flexure Mechanism

Thorlabs' CPU1 30 mm Rotating Cage Segment Plate allows an entire 30 mm cage subsystem to be rotated about the optical axis. The CPU1 consists of two plates: one attaches to a fixed cage segment, while the other rotates all attached cage elements. To rotate a cage segment between two fixed cage segments, two CPU1 plates must be used. The rotating cage segment is ideal for rotating multiple optical elements where the rotation of each element must be the same (e.g., using two cylindrical lenses to change the spatial profile of a laser diode or for multi-element polarization applications).

The rotating cage segment plate features a 1" deep, SM1-threaded (1.035"-40) central bore through the part that remains fixed as the plate is rotated. Two SM1RR retaining rings are provided for direct mounting of optics.

Each side of the cage plate has four blind holes for attaching cage rods, and thus, the cage rods must terminate at this cage plate. Each rod is held in place by a side-located locking M4 setscrew, which can be secured using a 5/64" (2 mm) balldriver or hex key. An engraved scale with 2° graduations allows for reliable manual positioning. After the rotation is adjusted, a flexure locking mechanism, which is engaged with a 5/64" (2 mm) hex key, secures the rotation. The fixed side of the cage plate is equipped with an 8-32 (M4) tapped hole for mounting with our Ø1/2" posts.

Click for Details

• Create Removable 30 mm Cage Segments
• SM1 (1.035"-40) Internal Thread
• Post Mountable via 8-32 (M4) Tapped Hole
• Compatible with 30 mm Cage Systems
• Two SM1RR Retaining Rings Included
• Available in 0.35" or 0.50" Thick Versions

Thorlabs' 30 mm Removable Cage Segment Plates provide the means to extract a portion of a cage system and replace it with other pre-aligned segments, as illustrated in the photo to the right. These cage plates add versatility to a cage system without disturbing any pre-aligned components while maintaining the rigidity of the cage system. They are equipped with a flexure cam lock to hold the cage plate in position prior to final tightening. The cage plates may be mounted on our Ø1/2" Posts via the 8-32 mounting holes located on the top and bottom of each part.

For additional information, please see the complete product presentation.

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LCP4S Adapter Mounted to
Quantalux^® sCMOS Camera for
Compatibility with 60 mm Cage Components. Note the LCP4S adapter has counterbored holes for 30 mm cage compatibility and through holes for 60 mm cage compatibility.

• Couples 30 mm and 60 mm Cage Systems
• Accepts ER Series Rods
• Four 4-40 Locking Screws for Securing 60 mm Cage Assemblies
• Counterbore Holes for 30 mm Cage Mounting
• Tapped with Our Standard SM1 Thread (1.035"-40)
• Not Post Mountable

The LCP4S Cage Plate Adapter provides a convenient means for coupling 30 mm and 60 mm cage assemblies via our Ø6 mm ER cage rods. The thin 4 mm (0.16") profile of this adapter is ideal for situations where axial space is limited. The centered SM1 (1.035"-40) tapped hole is compatible with our SM1-threaded lens tubes. Each of the outer through holes for 60 mm cage compatability is accompanied by a side-located locking 4-40 setscrew, which can be secured using a 0.05" (1.3 mm) hex key. The four inner holes for 30 mm cage compatability are counterbored for use with 4-40 x 3/16'' cap screws which are sold seperately (SH4S019 recomended). Unlike the LCP02(/M) cage plate adapters, this adapter does not have a tapped hole for post mounting due to the thin profile.

Additionally, this cage plate adapter facilitates the mounting of our compact scientific cameras on 60 mm cage components (see image to the right). For example, our 2CM2 Two-Camera Mount for Microscopes incorporates two LCP4S adapters. The thin profile of the adapter is required to position the image plane of the cameras within the adjustable focus range of the mount.

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LCP6X Adapter Mounted to a
Zelux™ CMOS Compact Camera for
Compatibility with 60 mm Cage Components

• Couples 30 mm and 60 mm Cage Systems
• Accepts ER Series Rods
• M4 x 0.7 Locking Screws for Securing 30 mm and 60 mm Cage Assemblies
• Tapped with Our Standard SM1 Thread (1.035"-40)
• Directly Accepts Ø1" Optics up to 0.08" (2 mm) Thick
• Not Post Mountable

The LCP6X Cage Plate Adapter provides a convenient means for coupling 30 mm and 60 mm cage assemblies via our Ø6 mm ER cage rods. The centered SM1-threaded (1.035"-40) hole is compatible with SM1-threaded lens tubes or Ø1" optics up to 0.08" (2 mm) thick (SM1RR retaining rings sold separately). Each cage rod through hole is accompanied by a side-located locking M4 x 0.7 setscrew that can be adjusted using a 5/64" (2 mm) hex key. These setscrews provide improved stability for attaching cage rods compared to the 4-40 setscrews used in the LCP4S cage plate adapter (sold above). Unlike the LCP02(/M) cage plate adapter, this cage plate adapter does not have a tapped hole for post mounting due to the thin profile.

Similar to the LCP4S adapter, the LCP6X adapter can facilitate the mounting of our compact scientific cameras on 60 mm cage components, as seen in the image to the right.

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The front plate of the CP44F assembly is held in place using magnets.

• 30 mm Cage Compatible Back Plate
• Magnetically Coupled Mounting Carriage
• Accepts Ø1" (25.4 mm) Optics up to 0.20" (5.1 mm) Thick
• Back Plate and Mounting Carriage Have Internal SM1 Threading
• One SM1RR Retaining Ring Included

The CP44F consists of a back plate compatible with the 30 mm cage system and a mounting carriage (front plate) that is magnetically coupled with pairs of rare earth magnets to the back plate. For stability, precision, and repeatability, the mounting carriage contacts the back plate at three points. Each point of contact is a ball bearing on the mounting carriage resting in the groove formed by two parallel steel pins. Since the axes defined by the three sets of pins share a common point of intersection, the system is properly constrained (kinematic). The mounting carriage can be easily inserted or removed from the fully assembled cage system by separating it from the back plate, rotating it sideways, and then extracting it from the cage.

The internal SM1 threading allows components up to 0.20" (5.1 mm) thick to be secured in the mounting carriage with the included SM1RR retaining ring. Components with external SM1 threading, like the SM1A7 alignment guide, can be threaded onto the mounting carriage. However, components mounted in this way [OD = 1.2" (30 mm)] cannot extend more than 3/16" (4.7 mm) beyond the face of the mounting carriage without sacrificing the ability to remove the mounting carriage and component from a closed cage system.

Both the CP44F and CP44F-B cage rod through holes have side-located M4 locking setscrews, which can be secured using a 5/64" (2 mm) balldriver or hex key.

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View Imperial Product List

Item #	Qty	Description
Imperial Product List
PH3	1	Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 3"
TR1.5	1	Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1.5"
CP36	1	30 mm Cage Plate, Ø1.2" Double Bore for SM1 and C-Mount Lens Tubes
CP33	1	SM1-Threaded 30 mm Cage Plate, 0.35" Thick, 2 Retaining Rings, 8-32 Tap
SM1L30	1	SM1 Lens Tube, 3.00" Thread Depth, One Retaining Ring Included
ER4-P4	1	Cage Assembly Rod, 4" Long, Ø6 mm, 4 Pack
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View Metric Product List

Item #	Qty	Description
Metric Product List
PH75/M	1	Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=75 mm
TR40/M	1	Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 40 mm
CP36	1	30 mm Cage Plate, Ø1.2" Double Bore for SM1 and C-Mount Lens Tubes
CP33/M	1	SM1-Threaded 30 mm Cage Plate, 0.35" Thick, 2 Retaining Rings, M4 Tap
SM1L30	1	SM1 Lens Tube, 3.00" Thread Depth, One Retaining Ring Included
ER4-P4	1	Cage Assembly Rod, 4" Long, Ø6 mm, 4 Pack
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• Ø1.2" Bore Supports Outside Diameter of SM1 Lens Tubes and C-Mount Extension Tubes
• Compatible with 30 mm Cage Systems
• Nylon-Tipped Setscrew and Double Bore Securely Hold Lens Tubes
• Not Post Mountable

The CP36 cage plate is designed to allow our SM1 Lens Tubes or C-Mount Extension Tubes to slide into the cage plate and be locked in position with a nylon-tipped 8-32 setscrew. This is ideal for situations where it is not desirable to thread the lens tube into one of our threaded cage plates. It will also allow our Ø1.2" free-space isolator packages to be integrated into a 30 mm cage system. A double-bore design gives three points of contact for stable and secure mounting. Each cage rod through hole is accompanied by a side-located locking M4 setscrew, which can be secured using a 5/64" (2 mm) hex key or balldriver.

Please note that this cage plate does not feature a tapped mounting hole, unlike many of our other cage plates. Due to the bore size, there would be interference between the threaded stud on our Ø1/2" posts and the clear aperture of the bore. Therefore, this cage plate cannot be used directly with Ø1/2" Posts, and a cage system utilizing this plate must be supported using a different method. For a post-mountable solution, consider our SM1RC or SM1TC lens tube clamps, but note that these parts are not cage compatible.

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The DCP1 Cage Mount Snapping into an Existing 30 mm Cage Segment
(Shown Here with ND Filter and CP02F Flexure Plates)

• Easy Insertion and Removal of a Ø1" Optic Within an Assembled 30 mm Cage System
• Flexure Lock Securely Clamps to Cage Rods
• Internal SM1 (1.035"-40) Threads Accept Optics Up to 0.24" (6.1 mm) Thick
• Drop-In Compatibility with SM1L03 Lens Tubes
• Not Post Mountable
• Two SM1RR Retaining Rings Included

The DCP1 Drop-In Cage Mount allows Ø1" optics to be easily inserted into or removed from an assembled 30 mm cage structure. The cage mount features two flexure locks with cap screws that can be tightened using a 5/64" (2 mm) hex key or balldriver. The SM1-threaded (1.035"-40) bore can hold Ø1" optics up to 0.24" (6.1 mm) thick using the included two SM1RR retaining rings. Unlike our other quick-release cage mounts, the DCP1 can be used with optics mounted inside SM1L03 lens tubes. For example, all of our SM1-threaded ND filters can be used with this cage mount. Longer lens tubes will block the cage mount from fitting into the cage system.

The DCP1 cage mount clamps to 30 mm cage rods across a diagonal, rather than to adjacent cage rods. To insert into a cage system, hold the mount diagonally and slide it below one cage rod, as illustrated in the photo to the right. Then twist the mount and snap it onto the cage rods before tightening the flexure clamp cap screws.

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QRC1A Quick-Release Clamp Mounted Within a 30 mm Cage System

• One-Handed Installation of a Ø1" Optic Within an Assembled 30 mm Cage System
• Dovetail Design with Spring-Loaded Release Provides Smooth Clamping Action
• Internal SM1 (1.035"-40) Threads Accept Optics Up to 0.14" (3.6 mm) Thick
• Two SM1RR Retaining Rings Included

The QRC1A cage mount is equipped with a spring-loaded dovetail clamp that secures or releases the cage mount to two of the four ER rods in the cage structure. The cage mount has internal SM1 threading that allows for optics up to 0.14" (3.6 mm) thick to be secured with the two included SM1RR retaining rings.

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STK01 Removable 30 mm Cage Mount Being Mounted Within a 30 mm Cage System

• Easy Placement and Removal of a Ø1" Optic Within an Assembled 30 mm Cage System
• Two Swing Latches Quickly Attach to Cage Rods
• SM1 (1.035"-40) Tapped Hole Accepts Optics Up to 0.19" (4.9 mm) Thick
• Two SM1RR Retaining Rings Included

The STK01 cage mount allows Ø1" optics to be inserted or removed from a closed 30 mm cage structure. The cage mount uses two swinging latches that are locked in place with four 5/64" (2 mm) hex locking screws. Optics 1" in diameter and up to 0.19" (4.9 mm) thick can be secured in the cage plate using the included two SM1RR retaining rings.

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CP38T Cage Plate in a
4-Axis Alignment System that can be Used
with Laser Diode Modules and Fiber Collimators.

• Compatible with 30 mm Cage Systems
• CP38: SM1 (1.035"-40) Internal Threading and Smooth Ø2" Outer Diameter
• CP38T: SM1 (1.035"-40) Internal Threading and SM2 (2.035"-40) External Threads
• Ideal for Mounting Cage Assemblies in Optomechanical Mounts Designed for Ø2" Optics
• Not Post Mountable

The CP38 and CP38T are ideal for mounting small cage subassemblies into optomechanical mounts designed for Ø2" optics (such as our KS2 Ø2" kinematic mirror mount) or SM2 threads (such as our SM2-threaded lens tubes). Both plates feature an SM1-threaded (1.035"-40) hole for mounting Ø1" optics up to 0.2" (5 mm) thick. Cage rods can be secured in each cage rod through hole by a side-located 5/64" (2.0 mm) hex setscrew. One SM1RR retaining ring is included. Please note that in order to mount a Ø1" optic in the SM1-threaded hole, two SM1RR retaining rings will be needed.

The CP38 has a smooth Ø2" outer diameter, which works well with Ø2" mounts with a setscrew, while the CP38T has SM2 (2.035"-40) external threads.

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View Imperial Product List

Item #	Qty	Description
CPPC	2	Ø1" Lens Tube Purge Connector, 8-32 Taps
PACU	1	Pure Air Circulator Unit
SM1L10	2	SM1 Lens Tube, 1.00" Thread Depth, One Retaining Ring Included
SM1T10	1	SM1 (1.035"-40) Coupler, External Threads, 1" Long, Two Locking Rings
SM1NT1	1	SM1 (1.035"-40) Locking Ring, 1.25" Outer Diameter, Slots for Spanner Wrench
SM1L20	1	SM1 Lens Tube, 2.00" Thread Depth, One Retaining Ring Included
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View Metric Product List

Item #	Qty	Description
CPPC/M	2	Ø1" Lens Tube Purge Connector, M4 Taps
PACU	1	Pure Air Circulator Unit
SM1L10	2	SM1 Lens Tube, 1.00" Thread Depth, One Retaining Ring Included
SM1T10	1	SM1 (1.035"-40) Coupler, External Threads, 1" Long, Two Locking Rings
SM1NT1	1	SM1 (1.035"-40) Locking Ring, 1.25" Outer Diameter, Slots for Spanner Wrench
SM1L20	1	SM1 Lens Tube, 2.00" Thread Depth, One Retaining Ring Included
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Two CPPC Purge Connectors can be used with our PACU Pure Air Circulator Unit, which operates ideally in a closed-loop configuration.

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Cross-Section View of CPPC Purge Connector with Two SM1L10 Lens Tubes

• Cage Plate with Integrated Purge Port for Connecting Two SM1 Lens Tubes
• Compatible with Thorlabs' PACU™ Pure Air Circulator Unit and 30 mm Cage Systems
• Cage Plate Thickness: 0.75" (19 mm)
• Max Pressure: 30 psi (200 kPa)
• Two 8-32 (M4) Mounting Holes at 90° Positions for Ø1/2" Post Mounting

The CPPC Cage Plate Purge Connector for SM1 Lens Tubes makes enclosed SM1 lens tube systems compatible with our PACU Pure Air Filtration System via the hose barb. The barb is compatible with 3/16" internal diameter tubing, such as that included with the PACU Pure Air Filtration System or our replacement tubing. The purge connector has SM1 (1.035"-40) internal thread to use with SM1 Lens Tubes or accessories. It also features four Ø6 mm bores for compatibility with our 30 mm cage system and is 0.75" (19 mm) thick. Each cage locking set screw has a 5/64" (2 mm) hex. The bottom and side of the cage plate also offer 8-32 (M4) mounting holes for post mounting.

We recommend using two or more CPPC Purge Connectors with our PACU Pure Air Circulator Unit, which has two connections: one for supply and one for return. This device incorporates dessicant and particulate filters in series and excels at providing an extremely clean, dry atmosphere for closed-loop experimental setups.

Note: The CPPC Purge Connector is strictly intended for purging or purifying the air in a lens-tube-enclosed beam path. Our lens tubes are not air tight and the SM1 thread is not suitable for pressurized or vacuum applications. Please do not apply sealant or tape to the thread.

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• Mounts Ø1/2" Post and Components in a 30 mm Cage System
• Double-Bored Hole and Locking Thumbscrew Securely Locks Post in Position
• CP33(/M) Cage-Plate-Style Front Face with SM1-Threaded Through-Hole

Thorlabs' 30 mm cage to Ø1/2" post adapters allow the integration of our post-mounted components into our 30 mm cage system. The front face of this clamp is similar to the CP33(/M) cage plate and accommodates our Ø6 mm ER cage rods which are secured using M4 x 0.7 side-located locking setscews [5/64" (2 mm) hex]. The center-located SM1 (1.035"-40) threaded bore, which is compatible with our popular Ø1" lens tubes, directly accepts a Ø1" optic up to 0.19" (4.8 mm) thick. Two SM1RR retaining rings are included.

The tail stock of this adapter has a double-bored through-hole and a spring-loaded thumbscrew that provide three-point contact for Ø1/2" posts for secure placement. Two versions are available, providing either 10 mm [Item # CPTS10(/M)] or 20 mm [Item # CPTS20(/M)] separation between the post center and the back of the cage plate.

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B4C Platform and the FFM1 Filter Holder Mounted Within the C4W Cube

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The CP360R Quick-Release Mount for Ø1" Optics Being Used Within the C6W Cube

• Two Models for 30 mm Cage Systems
• Two Sides with Ø1.75" (44.5 mm) Through Holes
• C4W: Four Sides with Four 4-40 Tapped Holes Around an SM1-Threaded Hole
• C6W: Two Sides with Four 4-40 Tapped Holes and Two Sides with Ø6 mm Clearance Through Holes Around an SM1-Threaded Hole
• Compatible with Ø6 mm ER Series Cage Rods
• Compatible with all Accessories Sold on this Page

The C4W offers four planar cube faces with 4-40 tapped holes for mounting cage system rods centered on an SM1 (1.035"-40) threaded hole. The "top" and "bottom" faces of the cube are machined with Ø1.75" (44.5 mm) holes and tapped holes designed for mounting our Cage Cube Plates (featured below).

The C6W offers the same machined face options as the C4W with the exception of two opposing faces machined with Ø6 mm through-holes rather than 4-40 tapped holes. This allows cage rods to pass through the cube, rather than be fastened to it. This unique feature allows the cube to be translated along the cage rods, and then locked in place with the included setscrews.

These cage cubes are compatible with a range of 30 mm Cage Components, including port hole covers and cage cube platforms.

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BS127CAM Beamsplitter Cube Adapter Mounted in the CCM1-4ER Cage Cube (Optic and Adapter Sold Separately)

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CCM1-4ER with Penta Prism (Optic Sold Separately)

• Compatible with 30 mm Cage System and SM1 Lens Tubes
• Directly Accepts 1" Cubes and 25 mm Right-Angle Prisms
• Mounting Adapters Available for Thorlabs' Beamsplitter Cubes Smaller than 25 mm
• Four SM1-Threaded Ports
• Base is Post Mountable via 8-32 (M4) Tap
• 3 Prism Alignment Stops Provide Accuracy of ±20 arcmin

These 1.5" wide cage cubes directly accept a 1" or 25 mm square optic, such as a beamsplitter cube or right-angle prism, with adapters available here for mounting a 5 mm (0.20"), 10 mm (0.39"), 12.7 mm (0.50"), or 20 mm (0.79") beamsplitter cube. The base of the cube has an 8-32 (M4) tap to attach to Ø1/2" Posts. Shown to the far right is a 12.7 mm (0.50") beamsplitter cube being mounted in the CCM1-4ER using the BS127CAM Beamsplitter Cube Adapter. Two cage cubes can be connected using ER rods and ERSCB Cage Rod Adapters.

The optic is clamped within the cube by tightening three 1.5 mm hex screws of a tension plate (see image to the right), allowing the user to replace the optic with any other compatible optic when necessary. The optic must sit flush against the three corners of the cube base. Do not overtighten the tension plate, this could damage the optic. The image to the right shows a penta prism mounted in a CCM1-4ER with the outer housing removed.